Changeset 13900
 Timestamp:
 06/16/16 16:42:37 (5 years ago)
 File:

 1 edited
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trunk/sources/HeuristicLab.Problems.DataAnalysis.Symbolic.Regression/3.4/SingleObjective/Evaluators/SymbolicRegressionConstantOptimizationEvaluator.cs
r13869 r13900 336 336 } 337 337 if (node.Symbol is Multiplication) { 338 AutoDiff.Term a, b;339 if (node.SubtreeCount == 1) {340 a = AutoDiff.TermBuilder.Constant(1);341 if (!TryTransformToAutoDiff( node.GetSubtree(0), variables, parameters, variableNames, updateVariableWeights, out b)) {338 List<AutoDiff.Term> terms = new List<Term>(); 339 foreach (var subTree in node.Subtrees) { 340 AutoDiff.Term t; 341 if (!TryTransformToAutoDiff(subTree, variables, parameters, variableNames, updateVariableWeights, out t)) { 342 342 term = null; 343 343 return false; 344 344 } 345 } else { 346 if (!TryTransformToAutoDiff(node.GetSubtree(0), variables, parameters, variableNames, updateVariableWeights, out a)  347 !TryTransformToAutoDiff(node.GetSubtree(1), variables, parameters, variableNames, updateVariableWeights, out b)) { 345 terms.Add(t); 346 } 347 if (terms.Count == 1) term = terms[0]; 348 else term = terms.Aggregate((a, b) => new AutoDiff.Product(a, b)); 349 return true; 350 351 } 352 if (node.Symbol is Division) { 353 List<AutoDiff.Term> terms = new List<Term>(); 354 foreach (var subTree in node.Subtrees) { 355 AutoDiff.Term t; 356 if (!TryTransformToAutoDiff(subTree, variables, parameters, variableNames, updateVariableWeights, out t)) { 348 357 term = null; 349 358 return false; 350 359 } 351 } 352 List<AutoDiff.Term> factors = new List<Term>(); 353 foreach (var subTree in node.Subtrees.Skip(2)) { 354 AutoDiff.Term f; 355 if (!TryTransformToAutoDiff(subTree, variables, parameters, variableNames, updateVariableWeights, out f)) { 356 term = null; 357 return false; 358 } 359 factors.Add(f); 360 } 361 term = AutoDiff.TermBuilder.Product(a, b, factors.ToArray()); 362 return true; 363 } 364 if (node.Symbol is Division) { 365 AutoDiff.Term a, b; 366 if (node.SubtreeCount == 1) { 367 a = AutoDiff.TermBuilder.Constant(1); 368 if (!TryTransformToAutoDiff(node.GetSubtree(0), variables, parameters, variableNames, updateVariableWeights, out b)) { 369 term = null; 370 return false; 371 } 372 } else { 373 if (!TryTransformToAutoDiff(node.GetSubtree(0), variables, parameters, variableNames, updateVariableWeights, out a)  374 !TryTransformToAutoDiff(node.GetSubtree(1), variables, parameters, variableNames, updateVariableWeights, out b)) { 375 term = null; 376 return false; 377 } 378 } 379 List<AutoDiff.Term> factors = new List<Term>(); 380 foreach (var subTree in node.Subtrees.Skip(2)) { 381 AutoDiff.Term f; 382 if (!TryTransformToAutoDiff(subTree, variables, parameters, variableNames, updateVariableWeights, out f)) { 383 term = null; 384 return false; 385 } 386 factors.Add(1.0 / f); 387 } 388 term = AutoDiff.TermBuilder.Product(a, 1.0 / b, factors.ToArray()); 360 terms.Add(t); 361 } 362 if (terms.Count == 1) term = 1.0 / terms[0]; 363 else term = terms.Aggregate((a, b) => new AutoDiff.Product(a, 1.0 / b)); 389 364 return true; 390 365 }
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